# Converter-Calculator — 10 Convert & Calculation Apps

> Bundle of 10 conversion and calculation apps with high accuracy. (iPhone/iPad app by Dohmann Engineering Services.)

- Source: https://appshunter.io/ios/app/converter-calculator/id513419019 (this page in markdown: same URL + `.md`)
- Developer: [Dohmann Engineering Services](https://appshunter.io/developer/401682475)
- Category: Reference, Utilities
- Price: $2.99
- Rating: 5.00/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 12.0 · 74 MB
- Languages: American English
- Released: 2012-04-02
- Data updated: 2026-06-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/converter-calculator/id513419019/reviews.md

## What is Converter?

This app is a bundle of 10 great Converter & Calculator apps for one low price & more are under development:
•Units Converter with over 1700 units in over 50 categories
•Currency Converter with over 160 currencies
•Hex-Decimal-Binary Converter
•IEEE754 Floating Point Converter
•Roman Numeral Converter
•Drill Bit Conveter
•Simple 4-Function Calculator
•Scientific Converter with up to 38 digits of precision
•Amortization Calculator
•A Collection of Reference Charts & Documents

Originally introduced in 2010 under the name of iGotCharts, this app originally contained a collection of reference charts and a modest units converter. However, it has grown to so much more since its introduction so we have changed its name to be more reflective of its full capabilities.

ConvertCalc was designed and developed by a professional engineer with over 45 years of metrology experience which is reflected in the features, capabilities, and accuracy of this app. It also has a very simple and attractive user interface.

You can easily disable units & charts you don't need and put them in whatever order best suits you, then save it as a favorite and quickly switch between your favorites and the app defaults.  There is also a powerful search feature to simplify locating a unit of interest, regardless of category. 

ConvertCalc is ideal for use in the kitchen as well as for engineering, surveying & scientific applications and anything in-between. Our conversion factors are consistent with NIST publications as well as other standards agencies and organizations such as API, BIPM, IAU, IEEE, IEC, etc. Every unit is defined & described. Whimsical units & systems such as smoots, FFF (furlong-firkin-fortnight) units and the Potrzebie System of units are also included for academic usage.

ConvertCalc uses 64-bit floating point math with a 52-bit significand, good for 15 significant digits of data presentation. We have developed advanced algorithms and proprietary conversion factors to maximize the computation accuracy. Where NIST or other agencies define an exact relationship between two units of measure, ConvertCalc will perform those calculations precisely without any rounding. Inexact conversions may have slight rounding in the 14th or 15th digit, which still provides at least 13 significant digits of accuracy.

It also includes a Hex-Decimal-Binary Converter with IEEE754 floating point notation capability and a Roman Numeral Converter. It also includes a Simple, Scientific and Amortization Calculator. The Scientific Calculator utilizes 64-bit base-10 decimal math providing 38 digit results.

General App Features:
• Retina support for both iPad and iPhone
• All orientations supported for all devices
• Swipe gestures simplify navigation and minimize button clutter
• Save favorites in any chart or unit category
• Quickly alphabetize or enable/disable all items in a category
• Reference charts and publications on a variety of topics
• Currency converter with over 160 currencies
• Extremely flexible units converter
• Definitions & descriptions of every chart and unit
• Print charts to Airprint printers
• Email feedback or charts from within the app

Units & Currency Converter Features:
• Enter & convert data in decimal, scientific, or fractional numbers
• Supports compound units (ft-in, st-lb-oz, hr-min-sec, etc.)
• Quickly & easily adjust output mode & display precision
• 64-bit math provides up to 15 significant digit conversions
• Use thumbwheel picker or tabular list to view conversions
• Indexed list of all individual units with powerful search feature
• Attractive graphics help identify the units
• Swipe up to update currency conversion rates
• Tap the equal sign to quickly swap the from/to units
• Tap the unit abbreviations for a description of that unit

We welcome your suggestions for additional units, charts, or other features. .

## Key features

- Over 1700 units in 50+ categories
- 160+ currencies supported
- Hex-Decimal-Binary and IEEE754 converters
- Scientific calculator with 38-digit precision
- Amortization calculator
- Reference charts and documents
- Customizable unit lists and favorites

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/converter-calculator/id513419019/reviews.md

### 5/5 — Best app of its kind

*2022-10-13*

Absolutely awesome app !  Others I have tried were not good.  Thanks for a great application !

## Frequently asked questions about Converter

### What is Converter-Calculator?

Converter-Calculator is a paid utility app that bundles 10 different conversion and calculation tools, including unit converters, currency converters, and various calculators. It was originally launched in 2010 and has since expanded its capabilities.

### What types of conversions does Converter-Calculator offer?

Converter-Calculator offers conversions for over 1700 units across 50+ categories, 160+ currencies, Hex-Decimal-Binary, IEEE754 floating point, Roman numerals, and drill bits. It also includes a scientific calculator with up to 38 digits of precision.

### How accurate are the conversions in Converter-Calculator?

The app utilizes 64-bit floating point math with a 52-bit significand, providing 15 significant digits of data presentation. Conversion factors are consistent with NIST and other standards agencies, ensuring precise calculations without rounding for exact relationships.

### Can I customize the units and charts in Converter-Calculator?

Yes, you can easily disable units and charts you don't need, arrange them in your preferred order, and save them as favorites for quick access. The app also features a powerful search function to locate specific units.

### What devices is Converter-Calculator compatible with?

Converter-Calculator supports iPhone, iPad, and iPod devices. It features Retina support for both iPad and iPhone and is designed to work in all orientations.

### How often is Converter-Calculator updated?

The latest version, 2.10, was released on December 24, 2024. While specific update frequency isn't detailed, the app has seen significant growth and development since its introduction in 2010.

### What is the price of Converter-Calculator?

Converter-Calculator is available for a one-time purchase of $2.99. It is a paid application with no in-app purchases or advertisements.

### Is Converter-Calculator suitable for professional use?

Yes, Converter-Calculator is ideal for engineering, surveying, and scientific applications due to its high accuracy and professional design. It is also useful for everyday tasks and academic purposes.

## Version history (last 5 releases)

### 2.10 — 2024-12-24

Updated for compatibility with iOS 18
Added Palladium to the Currency Converter

### 2.09 — 2023-06-13

Bug fixes

### 2.08 — 2022-10-12

User Interface Improvements.
Updated for iOS 16 & iPhone 14 Compatibility.

### 2.05 — 2020-06-30

updated for iOS 13 and iPhone 11 compatibility
some chart updates

### 2.03 — 2018-05-24

Name change to better reflect the capabilities of this great app
Update for iOS11
Added a Calculator Category with Simple, Scientific & Amortization Calculators
Fixed some Typos

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## More apps by Dohmann Engineering Services

- [Floating Point Converter](https://appshunter.io/ios/app/floating-point-converter/id413370135)
- [iConvert Hex Decimal Binary](https://appshunter.io/ios/app/iconvert-hex-decimal-binary/id419214766)
- [iTempConvert Plus](https://appshunter.io/ios/app/itempconvert-plus/id421185599)
- [RTD Reference](https://appshunter.io/ios/app/rtd-reference/id424267590)
- [Scientific Calculator DES-38D](https://appshunter.io/ios/app/scientific-calculator-des-38d/id1379779839)

All apps by Dohmann Engineering Services: https://appshunter.io/developer/401682475

## Related topics

[dohmann engineering services](https://appshunter.io/ios/topics/dohmann-engineering-services)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*